361/360

Interval information

Ratio	361/360
Subgroup monzo	2.3.5.19 [-3 -2 -1 2⟩
Size in cents	4.802317¢
Names	go comma, dudon comma
Color name	19oog2, nonogu 2nd, Nonogu comma
FJS name	[math]\displaystyle{ \text{d2}^{19,19}_{5} }[/math]
Special properties	square superparticular, reduced
Tenney height (log2 nd)	16.9877
Weil height (log2 max(n, d))	16.9917
Wilson height (sopfr(nd))	55
Harmonic entropy (Shannon, [math]\displaystyle{ \sqrt{nd} }[/math])	~1.41106 bits
Comma size	small
S-expression	S19
Open this interval in xen-calc

361/360, the go comma or dudon comma, also described as the undevicesimal semitones comma is a 19-limit (also 2.3.5.19 subgroup) superparticular comma of about 4.8 cents. It is the difference between 19/18 and 20/19, the two undevicesimal semitones, as well as between 19/15 and 24/19, the two undevicesimal major thirds. It is also the difference between two stacked 19/18 and 10/9. By tempering it out is defined the dudon temperament, which enables the dudon chords.

Etymology

The name go comma was named by Xenwolf in 2013. It is so named after go board, which has a 19×19 grid. However, dudon comma (named for Jacques Dudon) was attested much earlier.

See also

• Small comma
• List of superparticular intervals